Brush-holder support.



No. 629,4I8. Patented July 25, |899. R. N. BAYLIS.

BRUSH HOLDER SUPPORT.

pppp mention filed May xa, 1599.)

:annum wnNEssEs: INVENTOR if/w J/l Mew www MW/MM ATTORNEY UNITED STATESPATENT EEICE.

ROBERT `N. BAYLIS, OF ENGLEVOOD, NFV JERSEY.

BRUSH-HOLDER SUPPORT.

SPECIFICATION forming part of Letters Patent No. 629,418, dated July 25,1899.

Application lefl May 13,1899. Serial No. 716,684. (No model.)

To all whom, it may concern,.-

Beit known that I, ROBERT N. Barras, a citizen of the United States,residin'g at Englewood, Bergen county, New Jersey, have invented certainnew and useful Improvements in Brush-Holder Supports, of which thefollowing is a full, clear, and exact description.

My invention relates to dynamo-electric mad chines; and it consists inthe improvement of kthe brush-holder supports therefor.

Among the objects of my invention are compactness, effectiveness,durability, simplicity of construction, and adjustability. In electricapparatus of this type, particularly for outdoor work, it is common toinclose the saine in a suitable housing or casing, which for many kindsof work must ,be very compact, leaving very little unoccupied spaceinside. This is particularly important in automobile-vehicle adjustment;but by the employment of my improved device the brush-holders may bequickly and easily adjusted to a nicety in a very short space of time,it being necessary to insert only one hand within the casing, whiletheother hand may be engaged on the outside rto manipulate` the clampingdevice, a portion of which islocated exteriorly. Furthermore, thebrush-holders may with the greatest facility be removed bodily from themachine for cleaning or repair and replaced without disturbing theadjustment.

In the accompanying drawings, Figure l is in the main a sectional planview showing a portion of a dynamo or motor casing fitted with myimproved supporting and adjusting device. Fig. 2 is a side elevation ofthe parts shown in Fig. 1, looking in the direction of Fig. 3 is a view,corresponding the arrow.

substantially to Fig. l, of one of several modivlications of which myinvention is susceptible.

In the drawings, Avis a commutator.

B B are the brushes, mounted in asuitable holder C. These brushes Il maybe carried by the holder in any suitable way. When the parts are inplace, one edge of the holder C is preferably closely adjacent to theperipheral surface of the commutator A, a condition found to benecessary to obtain the best results in practice. When the diameter ofthe com mutator has become reduced either` from wear or otherwise, itAis desirable to readjust the position ot' the brush-holder, and to thatend I provide a suitable means which comprises a slide-block at one endof the holder, (or at both ends when it is desired to have the holderreversible,) which may be adjustably engaged in the desired position byan intermediary grip device. Figs. Jl and 2, this grip device comprisesastationary jaw D and a movable clamping-jaw D', the latter beingfulcrumed at a'suitable point, as at d. These parts D and D' arepreferably carried by a removable cover-plate E', fitting into anopening in the casing and secured thereto by suitable means. If desired,this grip device may be attached directly to or be integral with thecasing-wall E.

F is the slide-block, which is engaged by the jaws D D.

G is a clamping-screw which projects from Vthe outside through thecover-plate E', the

threaded end of which screw takes into one end of themovableclamping-jaw D', so that by turning said screw the clamp is tightened orloosened, as desired. In the specific forni shown when theclamping-screw Gris loosened the end ot' the clamping-jaw D which engages the slide-blocl F is freed therefrom sufliciently to permit theslide-block to be moved up or down, and thus the holder C may beadjusted to the desired distance from the commutator, the clampingdevice acting as a guide for said brush-holder. When the proper positionhas been ascertained, the clamping-screw G is turned up and theintermediary clamping device is brought into tight engagement with theslide-block F and the brush-holder is positively engaged in the desiredposition. Various ways of insulating In the preferred form,

the several parts may be employed, but l prefer to provide strips ofinsulation H II, which may be carried by the jaws D D and preferablyheldthereto by the use of suitable screws 7L h or otherwise. By this meansthe brushholder will be properly insulated from the casing and from theexposed head of the adjusting-screw G.

In the modification shown in Fig. 3 instead of employing a pair of jawsfor the clamping device I have formed an elongated undercut groove inthe slide-block F', into which groove a headed clamping memberJprojects, which member acts as the clamping intermediary, by which thexed position of l,the holder is determined and to that end correspondsto the movable clamping-jaws shown in Figs. l and 2. The clamping memberJ `is by preference provided with asuitable angular projectionj, whichprojects into a correspondingly-shaped recess in the inside of thecoverplate E4, where the same is employed, (otherwisein the casing E3.)so that the brush-holder cannot be turned out of the proper angle to thecom mutator. Passing through the coverplate from the outside (or throughthe casing if the former is not employed) is a clampingscrew G, theinner end of which is preferably threaded and takes into the member J.

By looseningr the screw G from the outside the holder maybe raisedorloweredto exactly the proper position by inserting one hand onlywithin the casing. In this case as in other cases it is desirable thatsuitable insulation be employed. To that end therefore I have shown apreferable way of insulating the brush-holder from the casing and fromthe adjusting-screw, comprising the pieces H2 Hwhich insulatetheintermediary J from the block F and the latter from the casing.

If desirable, thin brass plates may be cemented or otherwise attached tothe insulating-strips II2 H3, whereby adhesion between theinsulating-strips and the adjacent part is prevented, thus insuringfreedom of action at all times when it becomes desirable to readjust theposition of the brush-holder.

It will be observed that one of the valuable features of the improvementliereinbefore described is that, irrespective of the adjustingmechanism, the attaching of the brush-holding device directly to thecover-plate, which is removable from the external casing, permitsfreedom of access to the brushes and their support as well as to thecommutator, since the same is located in close proximity to the saidremovable cover-plate and its allied parts.

IVhile it is preferable to adjust the holder in the method beforedescribed, it may be found desirable in some cases to adjust the same byremoving the cover-plate and the brush-holder bodily. In such an event,of course, it might not be necessary to extend the adjusting devicethrough the cover-plate.

What I claim isl. In an apparatus of the character specitied, anexternal casing, an internal adjustable brush-holder, an adjustingdevice projecting from the outside to the inside of the casing, and anintermediate clamping device between the adj usting member and thebrushholding member.

2. In an apparatus of the character specified, an external casing, aninternal adjustable brush-holder, an adjusting device projecting fromthe outside to the inside of the casing, and an intermediate guide andclamping device between the adjusting member and the brush-holdingmember.

3. In an apparatus of the character specified, an external casing, aninternal adjustable brush-holder, an adjusting device projecting fromthe outside to the inside of the casing, and an intermediate one-pieceguide and clamping device between the adjusting member and thebrush-holding member.

4. In an apparatus of the character specitied, an external casing, aninternal adjustable brush-holder, a screw-threaded adjusting deviceprojecting from the outside to the inside of the casing, and anintermediate clamping device between the adjusting member and thebrush-holding member.

5. In an apparatus of the character specified, an external casing, aninternal adjustable brush-holder, a slide-block at the end thereof, anadjusting device projecting from the outside to the inside of thecasing, andan intermediate clamping device between the adjusting memberand the brush-holding member.

o. In an apparatus of the character specitied, an external casing, aninternal adjustable brush-holder, an adjusting device projecting fromthe outside to the inside of the casing, and an intermediate clampingdevice between the adj usting member and the brushholding member, all ofsaid parts being carried by a removable cover-plate.

7. In a device oi the character specified, an external casing, aninternal brush-holder, a removable cover-plate carried by said casing,the said brush-holder being in turn carried by the said cover-plate.

R. N. BAYLIS.

Witnesses:

R. C. MITcHELL, ERNEsT GREY.

IOO

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